Weaving loom



June 29 1926.

A. ZANCHI WEAVING L0 0M Filed May 21. 1924 2 Sheets-Sheet 1 Jaye Z07 June 29 1926.

A. zANcHl WEAVING LOOM Filed May 21. 1924 2 Sheets-Shut 2 FTP-7T1 Patented June 29, 1926.

ATTILIO ZANCEI,

OF SE VESO SAN PIETRO, ITALY, ASSIGNOR T ENBAGH & 00., 0F SEVESO SAN IBIETRQITALY.

FRATELLI SGHWARZ- wmvmc Loon.

Application filed m 21, 1924, Serial No. 714,893, andiin Switzerland July 27, 1928.

The subject matter of the resent invention is a weaving loom with w ich the working speed or the number of revolutions of the driving shaft respectively can be ma- 6 teriall increased so that its output is considera ly raised in comparison with the hitherto known looms.

The weaving loom according to the present invention is characterized in that the reed 1 forms. a part separated from the batten proper, the reed and the batten being driven in such a manner that both parts move to gether from the extreme rear position over 7 a portion of the total distance to the point where the weft is beaten up, whereupon the reed is moved away from the batten, precedes the latter and is moved quicker and further (up to the beating up point) and returns to the batten which in the meantime has also started on its return movement so that the batten and reed move together into their extreme rear position.

It is to be noted that the batten travels only over a part of the total distance from the extreme rear position to the beating up point while the total distance is solely covered by the reed. Both movements occur during the same interval, for instance during one revolution of the crank shaft. The distance over which the batten moves during this interval, may be kept smaller with the weaving loom according to the present invention than with the weaving looms of the hitherto known type whereby the speed relat-ions for the batten become more favourable. The passage of the shuttle, which obviously must take place during the time in which the batten and the reedm'ove in unison, is performed during the most favourthe warp threads owing to the friction of the reed will not occur as the accelerated movement of the reed usually takes place when the shed is not totally open, i. e. when the warp threads are not already heavily tensioned.

1 able position ofthe shed in which the upper lrcferably the reed together with the aids for the shuttle is articulated to the b tten at a point situated below the point at which theconnecting rods actuating'the batten are linked to the latter and the reed is connected by means of links to cam discs fixed on the crank pins of the crank driving the batten. These cam discs are preferably concentric to the crank pins to an angular extent of somewhat more than 180 and the remainder of the crank discs is eccentric. The concentric part of the cam impartsv to the reed the same movement as the crank imparts to the batten and the eccentric part of the crank disc imparts the accelerated movement to the reed. y

Obviously the means adapted to effect the movement of the reed may also differ from those mentioned above without from the essence of the present invention, provided such means effect the movement of the reed so that it moves in unison with the batten during a certain period and thereafter cause the accelerated movement of the reed away from the batten .into the beating up position.

A constructional example of a weaving loom according to the present invention is illustrated on the accompanying drawings, in which p Fig. 1 is a vertical section through the weaving loom,

Fig. 2 is a side elevation partly in section along line AB of Fig. 1. V

Fig. 3 shows parts of the loom in a section along line CD of Fig. 1,

Fig. 4 shows on a smaller scale an elevation view of the batten and of the reed,

Fig. 5 shows in a cross-section the upper part of the batten and the reed in their front extreme position,

Fig. 6 shows a detail, and

Fig. 7 shows in a vertical section the cam disc and its operative connection to the links causing the movement of the reed.

Fig. 8 is a viewsimilar to Fig. 3, showing the parts in a different position.

Referring now to the drawings, in the frame 1 of the weaving loom the crank shaft 2 is rotatably mounted, the latter being provided with a crank 3 (Fig. 3) on each side of the frame. The crank pin 4 is connected with the batten 6 by means of departing a connecting rod 5, the point in which the latter is pivoted to the batten being designated by 7 (Fig. 1).' The reed 8 together with its guide way 9 for the shuttle forms a separate unitary structure (Figs. 3-5), linked by the arms 10 to the arms 11 carrying the. batten at a point 12 (Fig. 1) situated below the point 7 at which the connecting rods 5 are linked to the batten 6. The arms 10 are connected by means of links 13 (Fig. 3) to cam-discs 14'rigidly fixed on the crank pins 4. The cam discs 14 are provided with a groove 18 with which a roller 15 rotatably mounted at the end of each link 13 co-operates, the latter are provided with slots 16, in which the pins 17 (Fig. 1) fixed to the connecting rods 5 are guided. The groove 18 of the cam-discs 14 is concentric to the crank. pin 4 over more than half of its extent; in the other half the groove 18 bul es out and is eccentric to the crank pin ig. 7). The cam-discs 14 are fixed to the crank pins in such a position that with the batten in its rear extreme position (Fig. 1), in which position the point 19 (Fig. 3) where the links 13 of the reed are pivoted to the arms 10 coincides (when seen from the side) with the point 7 (Fig. 1) where the connecting rods 3 are pivoted to the arms 11 of the batten, the roller 15 of the links 13 is situated in the middle of the concentric part of the groove 18. To the upper end of the arms 11 carrying the batten, brackets 20 (Figs. 5 and 6) are fixed to which screw bolts 21 are attached, which pass through slots 22 (Fig. 2) provided in the upper end of the arms 10 carrying the reed. At the rear of the head 23 of the bolts 21 a buffer 24, for instance a rubber buffer, is arranged (Fig. 6) and a second buffer 27 is provided in front of a nut 25 and a back-nut 26. The buffer 24 may be adjusted by an adjustment of the screw bolt 21 relatively to the bracket 20 and the adjustment of the buffer 27 is effected by adjusting the nuts 25 and 26 relatively to the screw bolt 21.

The weaving loom just described works as follows:

In the rear extreme position of the batten (Fig. 1) the front face of the reed or of its bars respectively is flush with the rear facing of the shuttle boxes. Upon a rotation of the crank shaft 2 the reed and the batten are moved towards the front, the movement of the batten being effected by the cranks 3 and the connecting rods 5 and that of the reed by the cam-disc 14 rotating together with the crank pin 4 about the axis of the crank shaft 2- and the links 13. As long as the rollers 15 of the links 13 co-operate with the concentricpart of the grooves 18, i. e. during approximately one quarter of a revolution of the crank. shaft, the reed and the batten do not change their positions relatively to each other; both parts carry out exactly the same movements. The relative positions of the parts at the end of the quarter turn is shown in dotted lines in Fig. 1. During the following quarter of a revolution of the crank shaft 2 the rollers 15 co-operate with the first half of the eccentric part 28 of the grooves 18 (Fig. 1) both parts, i. e. the reed and the batten, continue in their forward movement, the reed, however, moves much quicker and over a greater distance than the batten, so that at the end of this quarter of a revolution solely the reed has reached the beating up point, whilst the batten has fallen behind by a distance indicated by a in Fig. 7.

The relative positions of the reed and the batten at this movement, i. e. at the end of the second quarter of a revolution of the crank shaft, is shown in Fig. 5. During the following quarter of a revolution both parts return, the reed returns, however, at a greater speed than the batten,as the rollers 15 co-operate with the second half of the eccentric part 28 of the grooves 18; towards the end of this third quarter of a revolution the reed is again in contact with the batten and during the fourth quarter of a revolution of the crank shaft both parts return with the same speed into their extreme rear position, as the rollers 15 cooperate during this interval with the concentric part of the grooves 18. The shuttle is shot during the interval in which both parts move withthe same speed, that is approximately during the interval in which the rollers 15 co-operate with the concentric part of the grooves 18.

The buffers 24 and 27 limit the extremefront and the extreme rear positions of the reed relatively to the batten and compensate any clearance between the roller 15 and the groove 18.

It will thus be seen that the amplitude of the oscillating movement of the comparatively heavy mass comprising the batten, the shuttle boxes and the arms carrying the batten is smaller than with the hitherto known weaving looms. The speed of the present loom may therefore be materially increased until the accelerating and retarding moments of the masses reach the same magnitude as with the known looms.

I claim 1. In a weaving loom, a swingably mounted batten, a reed, guide means for the shuttle, a part of said guide means being connected to thereed, the reed and its guide means part forming a unitary structure distinguished from the batten and arranged to move in advance of the batten at the end of the beat-up movement, and means adapted to impart an oscillatory movement to the reed and to the batten together between the extreme rear position and a point intermediate to the reed an additional osci' atory movement beyond the limit of movement of the batten relatively to the batten at a quicker rate between the intermediate point and the beating up point.

2. In a weaving loom, a swingably mounted batten, a reed, guide means for the shuttle, a part of said guide means being connected to the reed, the latter and its guide means part forming a unitary structure distinguished from the batten and arranged to move in advance of the batten at the end of the beat-up movement, a drivingshaft, and means interposed between the driving shaft and the batten and the reedto move together from the extreme rear position over a portion of the total distance to the beating up point whereupon the reed is moved beyond the limit of movement of the batten at a quicker rate up to the beating up point and returns then to the batten whereafter the batten and the reed together return into the extreme rear position. I

3. In a weaving loom, a swingably mounted batten, a reed, guide means for the shuttle, a part of said guide means belng connected to the reed, the latter and its guide means part forming a unitary structure distinguished from the batten, a driving crank shaft, connecting rods operatively connected to the crank shaft and pivoted to the batten for imparting an oscillatory movement to the batten between the extreme rear position and a point intermediate of the beating up point, a pivot connection between said uni tary structure and the batten, the pivot being situated below the pivot of the connecting rods, a cam disc rotated by said crank shaft, and an operative connection between said unitary structure and said cam-disc, for imparting to said unitary structure an oscillatory movement between the extreme rear position and a point intermediate of the beating up point in unison with the oscillatory movement of the batten and an additional oscillatory movement relatively to the batten and at a quicker rate between said intermediate point and the beating up point.

4. In a weaving loom, a swingably mounted batten, a reed, guide means for the shuttle, a part of said guide means being connected to the reed, the latter and its guide means part forming a unitary structure distinguished from the batten, a driving crank shaft, connecting rods operatively connected to the crank shaft and pivoted to the batten for imparting an oscillatory movement to the batten between the extreme rear position and a point intermediate of the beat-ing up point, a pivot connection between said unitary structure and the batten, the pivot being situated below the pivot of the connecting rods, a cam disc fixed to the crank pin of said driving crank shaft, said cam-disc comprising a part concentric to the crank pin and a part eccentric thereto, and an operative connection between 'said unitary structure and said cam-disc for imparting to said unitary structure an oscillatory movement between the extreme rear position and a point intermediate of the beating up point in unison with the oscillatory movement of the batten and an additional oscillatory movement relatively to the batten and at a quicker rate between said intermediate point and the beating up point.

5. In a weaving loom, a swingably mounted batten, a reed, guide means for the shuttle, a part of said guide means being connected to the reed, the latter and its guide means part forming a unitary structure dis tingllished from the batten, a driving crank shaft, connecting rods operatively connected tot-he crank shaft and pivoted to the batten for imparting an oscillatory movement to the batten between the extreme rear position and a point intermediate of the beating up point, a pivot connection between said unitary structure and the batten, the pivot being situated below-the pivot of the connecting rods, a cam disc rotated by said crank shaft, and links interposed between camdisc and said unitary structure for imparting to the latter an oscillatory movement between the extreme rear position and a point intermediate of the beating up point in unison with the oscillatory movement of the batten and an additional oscillatory movement relatively to the batten and at a quicker rate between said intermediate point and the beating up point.

6. In a weaving loom, a swingably mounted batten, a reed, guide means for the shuttle, a part of said nected to the reed, means tinguished from the batten, a driving crank shaft, connecting rods operatively connected to the crank shaft and pivoted to the batten for imparting an oscillatory movement to the batten between the extreme rear position and a point intermediate of the beating up point, a pivot connection between said unitary structure and the batten, the pivot being situated below the pivot of the connecting rods, a cam disc fixed to the crank pin of said driving crank shaft, said cam disc comprising a part concentric to the crank pin and a part eccentric thereto, and links interposed between said cam disc and said unitary structure for imparting to the latter an oscillatory movement between the extreme rear position and a point intermediate of the beating up point in unison with the oscillatory movement of the bat-ten and an ad ditional oscillatory movement relatively to the batten and at a quicker rate between said intermediate point and the beating up point.

7. In a loom, the combination with a bat- .the latter and its guide part forming a unitary structure disten and a reed movable relatively thereto; point to the beating u position, whereby of mechanism to cause the batten to move the path of movement 0? the batten is mainbetween its extreme rear position and an intained of smaller extent than the path of 10 termediate point between said rear position movement of the reed. I

and the beating up point, and to cause the In testimony whereof I afllx my signareed to move in unison with the batten to ture.

said point an'dth'enproceed beyond said v ATTILIO 'ZANCHI. 

